You say you run "older birds".....like you might have hopes of replacing them in the future. Instead of getting a TM that would specifically work well NOW with 1199s, how about think about which way you think you want to go with electronics in the future? Once you answer that question, then look for the best TM to pair up with that future electronics choice. That way, you'll be working to set yourself up with a system that will last long term without possibly having to backtrack on today's expenditure at some point in the future. Use that info to choose the TM that will make that future match-up the ideal you eventually would like to have.
Agreed. It’s so constraining that HB only talk to MinnKota, but MG talks to Lowrance. It should be universal. But they make less money that way.